The Stanford-Binet Intelligence Scales, Fifth Edition (SB5) is one of the most respected IQ tests in the world. Administered by a licensed psychologist, it measures five cognitive factors — fluid reasoning, knowledge, quantitative reasoning, visual-spatial processing, and working memory — and produces a Full Scale IQ (FSIQ) score.
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Test Structure
The SB5 assesses five cognitive factors, each with both verbal and nonverbal tasks. This dual-domain design makes it one of the most comprehensive and fairest IQ tests available.
Measures novel problem-solving without relying on prior knowledge — the purest measure of intelligence. Includes verbal and nonverbal tasks: inductive reasoning (finding rules from patterns) and deductive reasoning (applying rules to problems).
Knowledge tests vocabulary and general information. Quantitative Reasoning measures mathematical problem-solving and numerical reasoning. Both sections have verbal and nonverbal formats, making the SB5 fair across language backgrounds.
Visual-Spatial tests ability to perceive spatial relationships and form/pattern recognition. Working Memory assesses how much information a child can hold and manipulate — a key predictor of academic performance.
Study Strategy
The SB5 is administered individually by a psychologist — unlike group tests. Make sure your child is comfortable with adult-directed one-on-one activities.
An accurate FSIQ helps the psychologist understand your child and make good recommendations. Coaching artificially inflated scores undermines the test's diagnostic value.
Cognitive performance is measurably affected by sleep and nutrition. The day before testing matters. No late nights or skipped breakfasts.
The SB5 takes 45–75 minutes for most children. Let your child know ahead of time — knowing what to expect reduces anxiety and improves performance.
The FSIQ is just the headline. The subtest breakdown reveals where your child is strongest and weakest — far more useful for educational planning.
Study Materials
Handpicked study guides to complement your online practice. Affiliate links — we earn a small commission at no extra cost to you.
Assessing Gifted Children: A Practical Guide for Parents
What IQ tests measure, how to read score reports, and how to advocate for your child in gifted programs and schools.
Smart But Stuck: Unlocking Your Child's Potential
For families navigating twice-exceptional children or unexpected IQ assessment results — how to move from testing to action.
Learn More
Stanford-Binet V Scores Explained: What Does Your Child's FSIQ Mean?
A parent-friendly guide to SB5 FSIQ classifications, percentile ranks, and what gifted scores look like.
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The two most widely used IQ tests for children — how they differ and when psychologists choose one over the other.
Read article →Common Questions
A comprehensive IQ test measuring 5 cognitive factors, used for gifted identification, learning disability assessment, and educational planning. Ages 2–90.
Both measure IQ; WISC-V is more commonly used for school-age children. SB5 has broader age range and is sometimes preferred for very young children or extremely gifted children (higher ceiling).
FSIQ 130+ (98th percentile) is typically "highly gifted"; 125+ qualifies for most gifted programs.
Always a licensed psychologist or trained school psychologist — never self-administered.
Minimally — the SB5 measures cognitive ability, not learned knowledge. Brief familiarization with the format is fine; intensive drilling is counterproductive.